<script setup>
import { getCodeImg } from "@/api/login";
import Cookies from "js-cookie";
import { encrypt, decrypt } from "@/utils/jsencrypt";
import useLoginUserStore from '@/store/modules/user'
import {useRoute, useRouter} from "vue-router";

const loginUserStore = useLoginUserStore()
const route = useRoute();
const router = useRouter();
const title = import.meta.env.VITE_APP_TITLE;

const loginForm = ref({
  username: "",
  password: "",
  rememberMe: true,
  verifyCode: "",
  verifyKey: ""
});

const loginRules = {
  username: [{ required: true, trigger: "blur", message: "请输入您的用户名" }],
  password: [{ required: true, trigger: "blur", message: "请输入您的登录密码" }],
  verifyCode: [{ required: true, trigger: "change", message: "请输入验证码" }]
};

const verifyCodeImageUrl = ref("");
const loading = ref(false);
// 验证码开关
const captchaEnabled = ref(true);

const redirect = ref(undefined);
const loginRef = ref(null)

watch(route, (newRoute) => {
  redirect.value = newRoute.query && newRoute.query.redirect;
}, { immediate: true });

function handleLogin() {
  loginRef.value.validate(async (valid) => {
    if (valid) {
      loading.value = true;
      // 勾选了需要记住密码设置在 cookie 中设置记住用户名和密码
      if (loginForm.value.rememberMe) {
        Cookies.set("username", loginForm.value.username, { expires: 30 });
        Cookies.set("password", encrypt(loginForm.value.password), { expires: 30 });
        Cookies.set("rememberMe", loginForm.value.rememberMe, { expires: 30 });
      } else {
        // 否则移除
        Cookies.remove("username");
        Cookies.remove("password");
        Cookies.remove("rememberMe");
      }
      // 调用action的登录方法
      loginUserStore.login(loginForm.value).then(() => {
        const query = route.query;
        let otherQueryParams = {}
        const result = {}
        Object.keys(query).forEach(function (key) {
          if (key !== "redirect") {
            result[key] = query[key]
            otherQueryParams = {...result, ...otherQueryParams}
          } else {
            const redirectValue = query[key]
            if (redirectValue.indexOf('?') >= 0) {
              let params = redirectValue.split('?').slice(1)[0].split('&')
              params.forEach(item => {
                let [key, value] = item.split('=')
                result[key] = value
                otherQueryParams = {...result, ...otherQueryParams}
              })
            }
          }
        })
        router.push({ path: redirect.value || "/", query: otherQueryParams });
      }).catch(() => {
        loading.value = false;
        // 重新获取验证码
        if (captchaEnabled.value) {
          getVerifyCode();
        }
      });
    }
  })
}

function getVerifyCode() {
  getCodeImg().then(res => {
    verifyCodeImageUrl.value = "data:image/gif;base64," + res.verifyCodeImage;
    loginForm.value.verifyKey = res.verifyKey;
  });
}

function getCookie() {
  const username = Cookies.get("username");
  const password = Cookies.get("password");
  const rememberMe = Cookies.get("rememberMe");
  loginForm.value = {
    username: username === undefined ? loginForm.value.username : username,
    password: password === undefined ? loginForm.value.password : decrypt(password),
    rememberMe: rememberMe === undefined ? false : Boolean(rememberMe)
  };
}

getVerifyCode();
getCookie();
</script>

<template>
  <div class="login">
    <el-form ref="loginRef" :model="loginForm" :rules="loginRules" class="login-form">
      <h3 class="title">{{title}}</h3>
      <el-form-item prop="username">
        <el-input
          v-model="loginForm.username"
          type="text"
          size="large"
          auto-complete="off"
          placeholder="用户名"
        >
          <template #prefix><svg-icon icon-class="user" class="el-input__icon input-icon" /></template>
        </el-input>
      </el-form-item>
      <el-form-item prop="password">
        <el-input
          v-model="loginForm.password"
          type="password"
          size="large"
          auto-complete="off"
          placeholder="登录密码"
          @keyup.enter="handleLogin"
        >
          <template #prefix><svg-icon icon-class="password" class="el-input__icon input-icon" /></template>
        </el-input>
      </el-form-item>
      <el-form-item prop="code" v-if="captchaEnabled">
        <el-input
          v-model="loginForm.verifyCode"
          size="large"
          auto-complete="off"
          placeholder="验证码"
          style="width: 63%"
          @keyup.enter="handleLogin"
        >
          <template #prefix><svg-icon icon-class="validCode" class="el-input__icon input-icon" /></template>
        </el-input>
        <div class="login-code">
          <img :src="verifyCodeImageUrl" @click="getVerifyCode" class="login-code-img"/>
        </div>
      </el-form-item>
      <el-checkbox v-model="loginForm.rememberMe" style="margin:0px 0px 25px 0px;">记住密码</el-checkbox>
      <el-form-item style="width:100%;">
        <el-button
          :loading="loading"
          size="large"
          type="primary"
          style="width:100%;"
          @click.prevent="handleLogin"
        >
          <span v-if="!loading">登 录</span>
          <span v-else>登 录 中...</span>
        </el-button>
      </el-form-item>
    </el-form>
    <!--  底部  -->
    <div class="el-login-footer">
      <span>Copyright © 2024 北京卓正志远软件有限公司.</span>
    </div>
  </div>
</template>

<style lang='scss' scoped>
.login {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  background-image: url("../assets/images/login-background.png");
  background-size: cover;
}
.title {
  margin: 0px auto 30px auto;
  text-align: center;
  color: #707070;
}

.login-form {
  border-radius: 6px;
  background: #ffffff;
  width: 400px;
  padding: 25px 25px 5px 25px;
  .el-input {
    height: 40px;
    input {
      height: 40px;
    }
  }
  .input-icon {
    height: 39px;
    width: 14px;
    margin-left: 0px;
  }
}
.login-tip {
  font-size: 13px;
  text-align: center;
  color: #bfbfbf;
}
.login-code {
  width: 33%;
  height: 40px;
  float: right;
  img {
    cursor: pointer;
    vertical-align: middle;
  }
}
.el-login-footer {
  height: 40px;
  line-height: 40px;
  position: fixed;
  bottom: 0;
  width: 100%;
  text-align: center;
  color: #fff;
  font-family: Arial;
  font-size: 12px;
  letter-spacing: 1px;
}
.login-code-img {
  height: 40px;
  padding-left: 12px;
}
</style>
